“GPT Image 1 - Medium” AI model thumbnail image is stretched in “Select AI Model” window

Steps to reproduce:
1. Create a new Unity project using a 3D Universal Template
2. Install Unity AI package
3. Open New Sprite generating window (Toolbar > AI button > Generate New > Sprite)
4. Press “Change” button to change AI Model
5. Observe “GPT Image 1 - Medium” model image

Actual results: “GPT Image 1 - Medium” model image is stretched
Expected results: “GPT Image 1 - Medium” model image should not be stretched

Reproducible with versions: 1.0.0-pre.20 (6000.3.3f1, 6000.4.0b3 6000.5.0a4)
Can’t test with versions: 6000.0.65f1 (No AI packages)

Tested on (OS): Ubuntu 24.04